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1. Explain the construction and working of a hydrometer with diagram.
a. According to the flotation principle, the weight of the liquid displaced by the immersed portion of the hydrometer is equal to the of the hydrometer.
b. The narrow tube has markings that measure the directly.
2. State the laws of flotation.
a. In a fluid, the weight of a floating body the weight of the fluid displaced by the body.
b. The floating body's center of gravity and its center of buoyancy are in the .
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